Upgrade to Pro — share decks privately, control downloads, hide ads and more …

写真はもう信用できない?フェイク検出から来歴証明へ

 写真はもう信用できない?フェイク検出から来歴証明へ

Avatar for Shuhei Shitamori

Shuhei Shitamori

October 25, 2025
Tweet

More Decks by Shuhei Shitamori

Other Decks in Technology

Transcript

  1. ࣗݾ঺հ Լ৿ɹपฏ • ΧφμͷσδλϧID ελʔτΞοϓ Ͱ
 ಇ͘iOS ΤϯδχΞ • Swift

    Package΍XCFramework͹͔ͬΓ৮ͬͯΔ • ॳΊͯࡳຈϚϥιϯʹࢀՃ 10km׬૸ • ࠷ۙɺձࣾΛ࡞Γ·ͨ͠ • ࠓ೔ͷൃද͸΄΅iOSʹؔ܎ͳ͍Ͱ͢ ࿈བྷઌɾSNS
  2. ϑΣΠΫࣸਅͷྺ࢙ (1) ҉ࣨɾϑΟϧϜͷ࣌୅ • ෺ཧతͳՃ޻ʹΑΔվ͟Μ • ଟॏ࿐ग़ͰͷࡱӨ • ҉ࣨ߹੒ •

    ߴίετͰઐ໳Ո͚͕ͩ࡞Εͨ ϑΣΠΫͷଘࡏ͸ೝ஌͞Ε͍͕ͯͨ
 ࣸਅࣗମ͸৴༻͞Ε͍ͯͨ https://en.wikipedia.org/wiki/ Brown_Lady_of_Raynham_Hall ৺ྶࣸਅ(Brown Lady) https://natgeo.nikkeibp.co.jp/atcl/ gallery/052101927/index.html?P=3 ผਓͷ঻૾͔Β߹੒ͨ͠
 ϦϯΧʔϯͷ঻૾
  3. ϑΣΠΫࣸਅݕग़ͷݶք ϐΫηϧσʔλͷ׆༻-1 ϐΫηϧσʔλ͔Βෆࣗવͳಛ௃Λ୳͢ • Ճ޻ɾੜ੒࣌ಛ༗ͷϊΠζ • ͋Γ͑ͳ͍෺ཧݱ৅ɾੜཧݱ৅ • ޫͷ൓ࣹ •

    ݂؅ • ଞͷը૾σʔλͱͷൺֱ ͜ΕΒͷ࢓૊ΈΛֶशͨ͠ߴੑೳAIͳΒಥഁՄೳੑେ ը૾σʔλ 001011100… ϐΫηϧσʔλ ϝλσʔλ ࡱӨ࣌৘ใ Exif ѹॖ৘ใ ඇѹॖ Ϗοτਂ౓ ̔bit ɾɾɾ ɾɾɾ
  4. ϑΣΠΫࣸਅݕग़ͷݶք ϐΫηϧσʔλͷ׆༻-2 Ճ޻ɾੜ੒࣌ʹ΢ΥʔλʔϚʔΫΛຒΊࠐΈ • Մࢹ΢ΥʔλʔϚʔΫ • ෆՄࢹ΢ΥʔλʔϚʔΫ • Google SynthID

    ΢ΥʔλʔϚʔΫΛຒΊࠐ·ͳ͍πʔϧ͕࢖ΘΕΔՄೳੑ ը૾σʔλ 001011100… ϐΫηϧσʔλ ϝλσʔλ ࡱӨ࣌৘ใ Exif ѹॖ৘ใ ඇѹॖ Ϗοτਂ౓ ̔bit ɾɾɾ ɾɾɾ https://deepmind.google/science/ synthid/
  5. ͳͥࠓਂࠁͳͷ͔ σδλϧϑΥτ× SNS × ੜ੒AI ࣌୅ ݱ୅͸ • ݸਓ΍૊৫͕͋ΒΏΔ໨తͰ •

    ϑΣΠΫͩͱݟഁΕͳ͍AIࣸਅΛੜ੒͠ • SNS্Ͱେྔʹ֦ࢄ͞ΕΔ࣌୅ Ұఆͷ৴༻ͷ͋ͬͨੲͱҧ͍ʮຊ෺ʯͷࣸਅ·ͰٙΘΕΔΑ͏ʹͳͬͨ
  6. ίϯςϯπฤूऀ ίϯςϯπར༻ऀ ίϯςϯπੜ੒ऀ C2PAن֨: Content Credentials • AdobeɾBBCɾSONYͳͲ͕ࡦఆ͢Δۀքඪ४ن֨ • ʮͲ͜Ͱɺ୭͕ɺͲͷΑ͏ʹ࡞੒ɾฤू͔ͨ͠ʯ


    ͱ͍͏དྷྺ৘ใΛσδλϧॺ໊෇͖Ͱอଘ Χϝϥ ੜ੒AI Adobe Photoshop Google Photo Youtube ը૾σʔλ ը૾σʔλ ը૾σʔλ ੜ੒དྷྺ৘ใ ΛຒΊࠐΈ ฤूདྷྺ৘ใ ΛຒΊࠐΈ ฤूདྷྺ৘ใ Λ֬ೝ BBC News https://c2pa.org/
  7. C2PA: Content Credentials ίϯςϯπσʔλʹॺ໊ࡁΈདྷྺϨίʔυσʔλຒΊࠐΈ • ੜ੒ऀ৘ใ͔ΒɺΧϝϥͰࡱӨ͞Ε͔ͨΘ͔Δ • ฤूऀ৘ใ͔ΒɺͲͷΑ͏ʹՃ޻͞Ε͔ͨΘ͔Δ • σʔλΛվ͟Μ͞Εͯ΋ॺ໊σʔλʹΑΓݕ஌Մೳ

    • ۀքඪ४ن֨ͳͷͰΤίγεςϜΛ࡞ΕΔ ը૾σʔλ 001011100… ϐΫηϧσʔλ ϝλσʔλ ࡱӨ࣌৘ใ Exif ѹॖ৘ใ ඇѹॖ Ϗοτਂ౓ ̔bit ɾɾɾ ɾɾɾ དྷྺϨίʔυσʔλ ॺ໊෇͖ੜ੒ऀ৘ใ ॺ໊෇͖ฤूऀ৘ใ ॺ໊෇͖ฤूऀ৘ใ ɾɾɾ
  8. JPEG Trust • JPEG͕ओಋ͢Δࠃࡍඪ४ن֨(ISO/IEC 21617) • 2025೥1݄ʹن֨Խ • ڈ೥ࡳຈͰن֨Խʹ޲͚ͨձ͕ٞ͋ͬͨΒ͍͠ •

    C2PAͷΑ͏ͳདྷྺ৘ใΛؚΊɺ
 ը૾ͷ৴༻౓Λ਺஋Խ ը૾ͷ৴༻ΛఆྔධՁͰ͖ΔΑ͏ʹͳΔ https://jpeg.org/jpegtrust/
  9. ΤίγεςϜͷݱঢ় C2PAରԠ͸ൃల్্, JPEG Trust͸ܾ·ͬͯͳ͍͜ͱ΋ଟ͍ • ੜ੒ऀ • Χϝϥ: Leica, Nikon,

    Sony, Google PixelͷҰ෦ػछ • ੜ੒AI: OpenAIͷDALLE • ฤू಺༰ͷ௥Ճ • Adobe Photoshop • ར༻ऀ • YouTube, Google Photo, BBC ੜ੒ऀ͔Βར༻ऀ·ͰC2PAରԠ͠ͳ͍ͱ͍͚ͳ͍ͷͰɺԸܙΛड͚ΒΕΔͷ͸΋͏গ͠ઌʹͳΓͦ͏
  10. iOSΤϯδχΞͱͯ͠Ͱ͖Δ͜ͱ • ։ൃΞϓϦͰC2PAΤίγεςϜ΁ͷߩݙ • ը૾ฤूΞϓϦ → ը૾ʹདྷྺϨίʔυΛ௥Ճ • ը૾഑৴ΞϓϦ →

    དྷྺϨίʔυΛ࡟আ͠ͳ͍ • χϡʔεΞϓϦ → JPEG TrustݕূʹΑΓ৴པ౓νΣοΫ • SNSΞϓϦ → JPEG TrustݕূʹΑΓ৴པ౓ΛՄࢹԽ • iPhoneΧϝϥ͕C2PAରԠ͞ΕΔΑ͏ʹApple΁ѹྗ iOS޲͚SDK https://github.com/contentauth/c2pa-ios